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% \section{Lua module}
%
% \begin{macrocode}
%<*lua>
% \end{macrocode}
% First we define some metadata.
% \begin{macrocode}
fontspec = fontspec or {}
local fontspec = fontspec
fontspec.module = {
name = "fontspec",
version = "2.5a",
date = "2016/02/01",
description = "Advanced font selection for LuaLaTeX.",
author = "Khaled Hosny, Philipp Gesang, Will Robertson",
copyright = "Khaled Hosny, Philipp Gesang, Will Robertson",
license = "LPPL"
}
local err, warn, info, log = luatexbase.provides_module(fontspec.module)
% \end{macrocode}
% Some utility functions
% \begin{macrocode}
fontspec.log = log or (function (s) luatexbase.module_info("fontspec", s) end)
fontspec.warning = warn or (function (s) luatexbase.module_warning("fontspec", s) end)
fontspec.error = err or (function (s) luatexbase.module_error("fontspec", s) end)
% \end{macrocode}
%
% The following are the function that get called from \TeX\ end.
% \begin{macrocode}
local function tempswatrue() tex.sprint([[\FontspecSetCheckBoolTrue ]]) end
local function tempswafalse() tex.sprint([[\FontspecSetCheckBoolFalse]]) end
% \end{macrocode}
%
% \begin{macrocode}
function fontspec.check_ot_script(fnt, script)
if luaotfload.aux.provides_script(font.id(fnt), script) then
tempswatrue()
else
tempswafalse()
end
end
% \end{macrocode}
%
% \begin{macrocode}
function fontspec.check_ot_lang(fnt, lang, script)
if luaotfload.aux.provides_language(font.id(fnt), script, lang) then
tempswatrue()
else
tempswafalse()
end
end
% \end{macrocode}
%
% \begin{macrocode}
function fontspec.check_ot_feat(fnt, feat, lang, script)
for _, f in ipairs { "+trep", "+tlig", "+anum" } do
if feat == f then
tempswatrue()
return
end
end
if luaotfload.aux.provides_feature(font.id(fnt), script, lang, feat) then
tempswatrue()
else
tempswafalse()
end
end
% \end{macrocode}
%
% \begin{macrocode}
function fontspec.mathfontdimen(fnt, str)
local mathdimens = luaotfload.aux.get_math_dimension(fnt, str)
if mathdimens then
tex.sprint(mathdimens)
tex.sprint("sp")
else
tex.sprint("0pt")
end
end
% \end{macrocode}
%
% \begin{macrocode}
%</lua>
% \end{macrocode}
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